<template>
  <el-breadcrumb separator=">">
    <transition-group name="breadcrumb">
      <!-- <el-breadcrumb-item v-for="(item,index) in levelList" v-if="item.meta.title" :key="item.path">
        <span v-if="item.redirect==='noredirect'||index==levelList.length-1" class="no-redirect">{{ item.meta.title }}</span>
        <a v-else @click.prevent="$openPage(item.path)">{{ item.meta.title }}</a>
      </el-breadcrumb-item> -->
      <el-breadcrumb-item v-for="(item,index) in levelList" v-if="item.title" :key="item.path">
        <span v-if="item.redirect==='noredirect'||index==levelList.length-1" class="no-redirect">{{ item.title }}</span>
        <a v-else @click.prevent="$openPage(item.path)">{{ item.title }}</a>
      </el-breadcrumb-item>
    </transition-group>
  </el-breadcrumb>
</template>

<script>
import pathToRegexp from "path-to-regexp";

export default {
  data() {
    return {
      levelList: []
    };
  },
  watch: {
    $route() {
      this.getBreadcrumb();
    }
  },
  created() {
    this.getBreadcrumb();
  },
  methods: {
    getBreadcrumb() {
      this.levelList = [];
      let matched = this.$route.matched.filter(item => {
        if (item.name) {
          return true;
        }
      });
      const breadcrumb = matched[1].meta.breadcrumb || [];
      if (breadcrumb.length) {
        this.levelList = breadcrumb;
      }
      // console.log(this.levelList);
    },
    pathCompile(path) {
      // To solve this problem https://github.com/PanJiaChen/vue-element-admin/issues/561
      const { params } = this.$route;
      var toPath = pathToRegexp.compile(path);
      return toPath(params);
    },
    handleLink(item) {
      const { redirect, path } = item;
      if (redirect) {
        this.$router.push(redirect);
        return;
      }
      this.$router.push(this.pathCompile(path));
    }
  }
};
</script>
